The Allegheny Institute reports that the mass transit systems in western Pennsylvania is costlier and less reliable than it should be. One reason is that it's a government-owned entity. That situation is compounded by a policy that does not prohibit strikes by workers:

The right to strike creates an enormous imbalance of power in contract negotiations that in turn enables the unions to extract well above market pay and benefits. Because many residents and businesses depend heavily on mass transit to get people to their jobs and many residents depend on transit for basic transportation needs, a strike-caused shut down of service results in substantial economic hardships. Thus, transit agencies are very reluctant to force bargaining issues to the point of a strike.

An institute brief, Pennsylvania Among Only a Handful of States Allowing Transit Strikes (PDF) has more.